Asphalt shingles require special attention when installed on unvented roof assemblies in hot humid mixed humid and marine climates due to inward vapor drive.
Raised roof shingles for ventilation.
When your attic is filled with spray foam insulation to create a hot roof your attic s temperature rises because the thermal envelope is shifted to the underside of your roof because ventilation is not present.
See the benefits of attic ventilation a new roof is more than just shingles.
Industry studies show that shingle temperature is only raised by a few degrees with a hot roof.
It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters connectors or end plugs needed.
Warranties on hot roofs.
An aluminum ridge vent has a mushroom shaped profile combined with a wide flange on both sides that sits on top of the roof shingles.
To achieve full ventilation of the attic there must be an air inlet at the base of the roof through perforations in the eaves soffit.
Features both an external and an internal sinewave shaped baffle designed to help guard against wind driven rain and slow infiltration.
Each section also contains integrated end plugs located every foot to reduce scrap when splicing.
The most effective vents have four open sides and rise above the roof which allows them to capture the wind from all directions to produce a suction effect.
A properly installed roofing system also depends on attic ventilation.
Effective attic ventilation systems reduce damaging heat and moisture in your attic promote energy efficiency by helping to reduce the load on your air conditioner in the summer and also reduce the risk of ice dam formation on your roof.
Certainteed intake vent provides continuous intake airflow at the roof s edge and provides proper intake ventilation for homes with little or no overhang.
A self contained 4 foot sectional shingle over ridge vent designed for ventilation.
This aluminum cap is the finished product and does not require additional asphalt shingle ridge caps.
Ventilation which balances air intake and exhaust in your attic is what allows your home to breathe.
To keep moisture out of the roof assembly a roofing underlayment with 1 perm or less class ii vapor retarder must be installed under the shingles.
The importance of proper attic ventilation while shingles are the most highly visible part of your roof ventilation is a critical component to your roofing system.
It s a roof top installed shingle over intake vent that can be used to supplement existing soffit or undereave vents.
